When Peppol e-invoicing is active, credit notes can only be created as e-credit notes from existing e-invoices. You cannot create standalone credit notes.

To issue a credit note, open the original e-invoice and select Create credit note - it will be automatically sent via Peppol, properly linked to the original invoice.

When you activate Peppol e-invoicing, auto-invoicing is automatically turned off. This is by design - each invoice needs to be reviewed and sent with all required e-invoicing fields (payment method, unit of measure, recipient CBE number) before being transmitted via Peppol. Auto-generated invoices would not reliably include all these fields.

Offline mode is disabled for all Belgian suppliers. The e-invoicing mandate requires B2B invoices to be sent via the Peppol network, which requires an active internet connection. Invoices created offline could not be sent via Peppol and would create compliance issues.

You can continue sending invoices via PDF/email to customers who are not yet on Peppol. However, since 1 January 2026, both parties are legally required to use structured e-invoicing for Belgian B2B transactions. As of 1 April 2026, the grace period has ended and penalties are actively enforced.

If your customer is not yet registered on Peppol, they are non-compliant and risk fines. We recommend informing them about this obligation and encouraging them to register as soon as possible.